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T E C H N I C A L
S P E C I F I C A T I O N
A N A L Y Z E R
Available Measurement Results:
Additional Features:
PSQM Measurement
Description:
Algorithm standard:
Sample rates:
Sound file formats:
Max. duration of measurement signals:
Gain Compensation:
Automatic Delay Compensation:
Static Delay:
Automated operation:
Available Measurement Results:
Available Q4/2001
1
F O R
T H E
O P E R A ™
Timesignal,
Delay vs. Time,
PESQ MOS,
Jitter,
Minimum, maximum and average delay,
Front-end clipping FEC
Hold-over time HOT
1
Attenuation
,
1
Background noise
,
1
Signal-to-noise (SNR) measurement,
MOS of silent and speech portions,
Detailed analysis of silent and speech portions,
Utterances detection
1
Delay histogram
1
File-based measurements,
Printing and graph exporting functionality,
Includes official ITU voice samples for testing,
Includes PESQ conformance test samples,
Includes PSQM conformance test samples
Perceptual measurement of speech quality according to
ITU-T rec. P.861. Indicates call clarity. Includes highly
optimized proprietary mapping from raw PSQM values to
P.800 Mean Opinion Score (MOS) scale. Results can be
directly compared to subjective listening tests.
Based on standard ITU-T rec. P.861
8 kHz and 16 kHz
WAVE-files containing A-law, mu-law, linear PCM (8 or 16
bit)
File-based:
32
2
On-line:
(
fs
(e.g. ~12.4 hours at 48 kHz, 16 bit resolution)
Maximum gain difference = ±60 dB
±1000 ms
Automatic Delay Compensation ±10 s
Supported
Timesignal,
Spectrum,
Excitation,
Percentage of silent intervals during measurement (Silence),
3
O B J E C T I V E
P E R C E P T U A L
,
1
,
,
As defined by WAVE-format
(
bitspersam
ple
) 8
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